package org.java.pay.web;

import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;
import org.java.pay.conf.AlipayConfig;
import org.java.pay.entity.Trade;
import org.java.pay.service.PayService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * @author WHQ
 * @version 1.0
 * @date 2022-3-18 0018 下午 5:01
 */
@Controller
public class PayController {

    @Autowired
    private PayService payService;
    /**
     * 支付的方法
     * 访问地址：http://api.shopping.com/pay/pay
     * @param trade
     * @param request
     * @param response
     */
    @PostMapping("/pay")
    public void pay(Trade trade, HttpServletRequest request, HttpServletResponse response) throws Exception {
        //获得支付需要的四个参数
        String tradeName = trade.getTradeName();
        String tradeNum = trade.getTradeNum();
        String tradeMsg = trade.getTradeMsg();
        String tradePrice = trade.getTradePrice();
        System.out.println(tradeNum);
        /*******************准备调用支付宝接口，传递参数*********************/
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = tradeNum;
        //付款金额，必填
        String total_amount = tradePrice;
        //订单名称，必填
        String subject = tradeName;
        //商品描述，可空
        String body = tradeMsg;

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //请求
        String result = alipayClient.pageExecute(alipayRequest).getBody();

        //设置响应格式
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        //输出
        out.println(result);
    }

    /**
     * 支付成功以后，处理回调的方法
     * @return
     * 请求地址:http://api.shopping.com/pay/success
     */
    @GetMapping("/success")
    public String paySuccess(HttpServletRequest request,HttpServletResponse response) throws Exception{
        System.out.println("#####################此代码在支付宝提供的result_url.jsp页面中#####################################3");
        //获取支付宝GET过来反馈信息
        Map<String,String> params = new HashMap<String,String>(1000);
        Map<String,String[]> requestParams = request.getParameterMap();
        for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
            String name = (String) iter.next();
            String[] values = (String[]) requestParams.get(name);
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i]
                        : valueStr + values[i] + ",";
            }
            //乱码解决，这段代码在出现乱码时使用
            valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
            params.put(name, valueStr);
        }

        boolean signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.alipay_public_key, AlipayConfig.charset, AlipayConfig.sign_type); //调用SDK验证签名

        //——请在这里编写您的程序（以下代码仅作参考）——
        if(signVerified) {
            //商户订单号
            String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");

            //支付宝交易号
            String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");

            //付款金额
            String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");

            //付款成功后，会执行回调,在回调函数中，可以获得已付款的订单编号 ，我们将付款订单号传递给一个方法，将这个已付款订单中包含的商品信息从
            return "redirect:http://api.shopping.com/pay/modifyOrder/"+out_trade_no;

        }else {

        }
        return "";
        //——请在这里编写您的程序（以上代码仅作参考）——
    }

    /**
     * 回调成功以后调用该方法，改变订单的状态
     * @param tradeNum
     * @return
     */
    @GetMapping("/modifyOrder/{tradeNum}")
    public String modifyOrder(@PathVariable("tradeNum")String tradeNum){
        payService.modifyOrder(tradeNum);
        return "redirect:http://www.shopping.com";
    }
}
